Answer :

The current gain β=50

Input current in a common emitter mode is the base current. Change in base current or input current = δIb=50μA

Output voltage, V0 =β×RG=50×20.5=200V

(a) Voltage Gain, VG=V0/V1

Input voltage, V1= δlb+Ri

Input resistance, Ri = 0.5kΩ = 500Ω

VG = 200/(50×106+500)


(b) Change in input voltage, δV1 = δlb×Ri

= 50×106×5×102

=25×103 V

=25 mV

(c) Resistance Gain, RG= Load Resistance/Input resistance

= RL/Ri

Power gain =β2×RG



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